为什么修改这个?因为我zabbix-server日志报错,提示connection to database 'zabbix' failed: [1040] Too many connections错误,mariadb正常。想到应该是mysql最大连接数问题。
1、查看默认最大连接数,默认是151
[[email protected] zabbix]# /usr/bin/mysql -u root -p Enter password: Welcome to the MariaDB monitor. Commands end with ; or \g. Your MariaDB connection id is 14872 Server version: 5.5.56-MariaDB MariaDB Server Copyright (c) 2000, 2017, Oracle, MariaDB Corporation Ab and others. Type 'help;' or '\h' for help. Type '\c' to clear the current input statement. MariaDB [(none)]> show variables like 'max_connections'; +-----------------+-------+ | Variable_name | Value | +-----------------+-------+ | max_connections | 151 | +-----------------+-------+ 1 row in set (0.00 sec)
2、修改/etc/my.cnf配置文件
在[mysqld]新添加一行:
[[email protected] zabbix]# vi /etc/my.cnf max_connections=1000
重启mariadb服务,并验证最大连接数(没显示我们修改的):
[[email protected] zabbix]# systemctl restart mariadb.service [[email protected] zabbix]# /usr/bin/mysql -u root -p Enter password: Welcome to the MariaDB monitor. Commands end with ; or \g. Your MariaDB connection id is 446 Server version: 5.5.56-MariaDB MariaDB Server Copyright (c) 2000, 2017, Oracle, MariaDB Corporation Ab and others. Type 'help;' or '\h' for help. Type '\c' to clear the current input statement. MariaDB [(none)]> show variables like 'max_connections'; +-----------------+-------+ | Variable_name | Value | +-----------------+-------+ | max_connections | 214 | +-----------------+-------+ 1 row in set (0.00 sec)
3、配置/usr/lib/systemd/system/mariadb.service来调大打开文件数目。
[[email protected] zabbix]# vi /usr/lib/systemd/system/mariadb.service 在[Service]新加这两行: LimitNOFILE=10000 LimitNPROC=10000
4、重新加载系统服务,并重启mariadb服务
[[email protected] zabbix]# systemctl --system daemon-reload [[email protected] zabbix]# systemctl restart mariadb.service
5、重新验证下,是否为1000
MariaDB [(none)]> show variables like 'max_connections'; ERROR 2006 (HY000): MySQL server has gone away No connection. Trying to reconnect... Connection id: 5 Current database: *** NONE *** +-----------------+-------+ | Variable_name | Value | +-----------------+-------+ | max_connections | 1000 | +-----------------+-------+ 1 row in set (0.00 sec)
原文地址:http://blog.51cto.com/net881004/2089199
时间: 2024-10-08 16:17:21